| A possible author of 'Iohannis celsi rimans misteria caeli' | Howlett, David
| Article in Journal | | 2010 |
| Aldhelm and Irish learning | Howlett, David | Article in Journal | | 1994 |
| An addition to the Hiberno-Latin canon: De ratione temporum | Howlett, David | Article in Book | | 2017 |
| Bede Lutting, and the Hiberno-Latin Tradition | Howlett, David | Article in Journal | | 2020 |
| Caledonian craftsmanship : the Scottish Latin tradition | Howlett, David | Monograph or Collective Volume | Four Courts | 2000 |
| Computus in Hiberno-Latin literature | Howlett, David | Article in Book | | 2010 |
| Dicuill on the islands of the north | Howlett, David | Article in Journal | | 1999 |
| Ex saliva scripturae meae | Howlett, David | Article in Book | | 1989 |
| Five experiments in textual reconstruction and analysis | Howlett, David | Article in Journal | | 1995 |
| Further manuscripts of Ailerán's Canon euangeliorum | Howlett, David | Article in Journal | | 2001 |
| Hellenic learning in insular Latin | Howlett, David | Article in Journal | | 1998 |
| Hiberno-Latin poems on the Eusebian Canons | Howlett, David
| Article in Journal | | 2010 |
| Hiberno-Latin syllabic poems in the Book of Cerne | Howlett, David | Article in Journal | | 2001 |
| Hilarius Hibernensis, Poet and Exegete | Howlett, David | Article in Journal | | 2023 |
| Insular inscriptions | Howlett, David | Monograph or Collective Volume | Four Courts | 2005 |
| Insular Inscriptions and the Problem of Coincidence : A Reply | Howlett, David | Article in Journal | | 2008 |
| Insular latin Idama, Iduma | Howlett, David | Article in Journal | | 1995 |
| Insular Latin writers' rhythms | Howlett, David | Article in Journal | | 1997 |
| Israelite learning in insular Latin : in memory of Henry Ephron and Nakdimon Doniach | Howlett, David | Article in Journal | | 1997 |
| Liber epistolarum sancti Patricii episcopi : the book of letters of saint Patrick the bishop | | Monograph or Collective Volume | Four Courts | 1994 |
| Muirchú Moccu Macthéini's 'Vita Sancti Patricii', Life of Saint Patrick | Howlett, David | Monograph or Collective Volume | Four Courts | 2006 |
| Music and the stars in early Irish compositions | Howlett, David | Article in Book | | 2013 |
| Rubisca : an edition, translation, and commentary | Howlett, David | Article in Journal | | 1996 |
| Sealed from within : self authenticating insular charters | Howlett, David | Monograph or Collective Volume | Four Courts | 1999 |
| Seven studies in seventh-century texts | Howlett, David | Article in Journal | | 1996 |
| Synodus prima Sancti Patricii : an exercise in textual reconstruction | Howlett, David R. | Article in Journal | | 1998 |
| The 'Altus Prosator' of Virgilius Maro Grammaticus | Howlett, David | Article in Book | | 2015 |
| The book of letters of Saint Patrick the bishop | Howlett, David R. | Monograph or Collective Volume | Four Courts | 1994 |
| The Old-Irish hymn 'Brigit Bé Bithmaith' | Howlett, David | Article in Journal | | 2012 |
| The polyphonic colophon to Cormac’s Psalter | Howlett, David | Article in Journal | | 1995 |
| The prologue to the Vita sancti Abbani | Howlett, David | Article in Journal | | 2001 |
| The prophecy of Saxon occupation in Gildas, 'De Excidio Britanniae' | Howlett, David | Article in Journal | | 2002 |
| Two Irish jokes|The Irish names in Suadbar's letter (Appendix) | Howlett, DavidIreland, Colin (Appendix) | Article in Book | | 2015 |
| Two mathematical poets | Howlett, David
| Article in Journal | | 2010 |
| Versus cuiusdam Scotti de alphabeto | Howlett, David
| Article in Journal | | 2010 |
| Vita I Sanctae Brigitae | Howlett, David | Article in Journal | | 1997 |